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WIRELESS MODEM
PULSE ‘S’ USER MANUAL
Technical Support:
V0.12
Toll Free:
1-800-617-3487
Worldwide:
(403) 230-1122
Fax:
(403) 276-9575
Web:
www.encomwireless.com
Email:
[email protected]
WIRELESS MODEM
PULSE ‘S’ USER MANUAL
Warnings and Precautions
The following symbols indicate important safety warnings and precautions throughout this manual.
They are defined as follows:
WARNING indicates that
serious bodily harm or death
may result from failure to
adhere to the precautions.
CAUTION indicates that
damage to equipment may
result if the instructions are
not followed.
NOTE suggests optimal
conditions under which the
equipment will operate
effectively and safely.
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Table of Contents
Warnings and Precautions................................................................................................................. 2
Table of Contents.............................................................................................................................. 3
Introduction ..................................................................................................................................... 5
Overview ................................................................................................................................................... 5
Product Description .................................................................................................................................. 5
Network Concepts..................................................................................................................................... 6
Mode of Operation ............................................................................................................................... 6
Supported Network Topologies ............................................................................................................ 7
Upstream and Downstream.................................................................................................................. 8
Hop Patterns ......................................................................................................................................... 8
Hardware ......................................................................................................................................... 9
Power ........................................................................................................................................................ 9
Antenna Connection ................................................................................................................................. 9
Serial Connection .................................................................................................................................... 10
Connector Pins .................................................................................................................................... 10
Supported Formats .............................................................................................................................10
RTS/CTS Operation..............................................................................................................................11
DCD Operation .................................................................................................................................... 11
USB Connection ...................................................................................................................................... 11
LED Indicators ......................................................................................................................................... 12
Power Indicator................................................................................................................................... 12
Serial Data Indicators ..........................................................................................................................13
RSSI Indicators..................................................................................................................................... 13
Software..........................................................................................................................................14
Overview .................................................................................................................................................14
Installation .............................................................................................................................................. 15
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Connecting the Modem to a Computer.................................................................................................. 15
Operation ................................................................................................................................................15
Troubleshooting ..............................................................................................................................16
General....................................................................................................................................................16
New Deployments................................................................................................................................... 17
Bench Test Your Radios.......................................................................................................................18
Bench Test Your Application ...............................................................................................................20
Install and Troubleshoot Your Radios ................................................................................................. 22
Connect Client Equipment ..................................................................................................................24
Existing Deployments..............................................................................................................................26
Appendix A: RF Exposure.................................................................................................................27
FCC ..........................................................................................................................................................27
Health Canada......................................................................................................................................... 27
Appendix B: Declaration of Conformity.............................................................................................28
FCC ..........................................................................................................................................................28
Warning (Part 15.21)...............................................................................................................................28
Industry Canada ...................................................................................................................................... 28
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Introduction
Overview
This manual is a reference for the ENCOM PULSE ‘S’ Wireless Modem.
It contains instructions, suggestions and information which will help you set up your equipment.
Product Description
ENCOM manufactures the PULSE family of Wireless Modems that are used to provide reliable wireless
communications between serial devices.
The PULSE ‘S’ is equipped with a standard RS232 DB9 connector, which you connect to your serial
device. Data from your serial device is transparently sent to other ENCOM PULSE Wireless Modems
using license free 900 MHz technology. LED indicators on the front panel provide serial and RF status
information.
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The USB connector on the front panel is reserved for our Windows based PULSE Link software
application. ENCOM PULSE Link is used to configure the PULSE family of modems, and also allows you to
optimize and diagnose PULSE deployments.
Typical applications for ENCOM PULSE Wireless Modems include:

SCADA

Remote Telemetry

Surveillance

Traffic Control

Industrial Controls

Remote Monitoring

Security

Display Signs

Railway Signs
Network Concepts
Mode of Operation
ENCOM supplies a PC based software application that you will use to define the mode of operation for
each ENCOM PULSE modem. A PULSE modem can be configured as one of the following:

Master

Repeater

Remote
ENCOM PULSE modems are deployed in networks. Each network typically consists of one Master radio,
and one or more Remote radios. Repeaters are optional, and when included in the network they are
physically positioned between the Master and Remote radios. In effect, they are used to extend the
network range.
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Supported Network Topologies
The simplest network consists of one Master and one Remote. This is referred to as a Point-to-Point
deployment. The example below shows a Point-to-Point Traffic Control application.
It is possible to have a Master directly communicate with more than one Remote. This is referred to as a
Point-to-Multipoint deployment.
Repeaters can be included in a network and can be deployed as required. However, it is important to
note that using Repeaters will increase your packet latency. ENCOM recommends that you determine
whether Repeaters are suitable for your application during system design.
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Upstream and Downstream
This document uses the terms upstream and downstream when describing the relative orientation of
Wireless Modems in a network. Data travelling from the Master towards the Remotes is said to be
flowing downstream. Conversely, data travelling towards the Master from the Remotes is said to be
flowing upstream.
Hop Patterns
ENCOM radios communicate using Frequency Hopping Spread Spectrum (FHSS) technology. A
predefined sequence of channel numbers is called a hop pattern. All radios that need to communicate
directly with one another must share the same hop pattern. Accordingly, Repeaters must be configured
to use two different hop patterns; one for communicating upstream and one for communicating
downstream.
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Hardware
Power
A barrel connector on the back of the Wireless Modem accepts 8-30 VDC, center positive.
ENCOM supplies a wall transformer with the Wireless Modem that converts 120 VAC to 12 VDC.
Antenna Connection
The ENCOM PULSE ‘S’ Wireless Modem is equipped with a Reverse Polarity TNC Female antenna
connector.
Please note that an antenna is not supplied with this product. Refer to the instructions provided by the
antenna manufacturer and comply with all installation instructions and recommendations.
The antenna and antenna cable should be installed before the Wireless Modem is powered on.
Always ensure that the radio
equipment is powered down
when installing the antenna.
Never work on an antenna
system when there is lightning
in the area.
The installation, removal or
maintenance of all antenna
components must be carried out
by qualified and experienced
personnel.
Direct human contact with the
antenna is potentially unhealthy
when the radio is generating RF
energy.
Do not operate the Wireless
Modem without an antenna
connected, as this can damage
the transmitter.
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Serial Connection
The Wireless Modem has a single DB9 female data port on the front panel, labeled DATA.
Connector Pins
The DATA port follows the RS232 DCE convention, although some pins are unused.
Pin
Description
Direction
1
DCD
Data Carrier Detect
Output
2
RXD
Receive Data
Output
3
TXD
Transmit Data
Input
5
GND
Signal Ground
7
RTS
Ready to Send
Input
8
CTS
Clear to Send
Output
Supported Formats
Baud Rates:
1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200
Data Bits:
7, 8
Parity:
None, Odd, Even
Stop Bits:
1, 2
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RTS/CTS Operation
The RTS/CTS control lines can be configured so they are:

Disabled

Used for conventional flow control

Used to frame data sent from your serial device to the Wireless Modem
DCD Operation
The DCD control line can be configured so it is:

Always ON

Only ON when the RF radio is synchronized

Used to frame data sent from the Wireless Modem to your serial device
USB Connection
The USB connector on the front panel accepts a Mini B cable.
ENCOM can provide a standard cable to connect the PULSE Wireless Modem to a PC.
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LED Indicators
There are several LEDs present on the front panel of the Wireless Modem.

Power indicator

Serial data indicators

RSSI indicators
SERIAL
POWER
RSSI
Each of these is described below.
Power Indicator
When this LED is ON, it indicates that the Wireless Modem has power and is operational.
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Serial Data Indicators
There are two LEDs, one labelled TX and one labelled RX. The behaviour of these LEDs depends on the
radio mode, as described in the following table.
Radio Mode
LED
Description
Master, or
TX
 Blinks when the radio is transmitting data
Remote
RX
 Blinks when the radio is receiving data
TX
Repeater
RX
 Blinks when the radio is transmitting data from an
attached serial device
 Does not blink when the radio is repeating data sent by
other serial devices
 Blinks when the radio is receiving data from an upstream
radio (Master, or another Repeater)
Note that when the ENCOM PULSE Link application is used to configure or test a Wireless Modem, the
serial data indicators actually show when the Wireless Modem is communicating with the computer.
RSSI Indicators
Three LEDs, stacked in a column, are used to present the RSSI (Received Signal Strength Indication).
When more LEDs are ON, this generally means the signal strength is greater, resulting in more reliable
communications.

One LED indicates that the link is weak

Two LEDs indicate that the link should be acceptable

Three LEDs indicate that the link should be strong and very reliable
The LEDs provide feedback on the health of the RF link. If the LEDs are OFF or blinking, you do not have
reliable RF communications. Please refer to the Troubleshooting section in this document for more
information.
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Software
Overview
ENCOM supplies an application called PULSE Link that can be used to:

Configure your ENCOM Wireless Modems

Optimize the performance of your wireless network

Diagnose network and communication issues
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Installation
The PULSE Link installation package can be downloaded from the ENCOM website. This package will
install both an application and a USB driver on your PC.
Please refer to the PULSE Link User Manual if you require additional assistance.
Connecting the Modem to a Computer
The ENCOM PULSE modem has a USB connector on the front panel that is reserved for interaction with
the PULSE Link application.
Once the PULSE modem has been installed and powered up:

Start the PULSE Link application on your PC

Connect the USB cable to your PC and your Wireless Modem
PULSE Link will detect the PULSE modem and will automatically retrieve the current settings.
Operation
The PULSE Link manual describes how the application can be used to configure modems, optimize
performance, and troubleshoot issues.
Please refer to the PULSE Link User Manual if you require additional assistance.
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Troubleshooting
General
This section describes basic troubleshooting procedures for PULSE deployments. By way of example, we
describe the steps that would be followed when interconnecting Traffic Controllers. However, the
principles are the same for any type of serial device.
ENCOM includes diagnostic facilities in the PULSE Link application that
allow you to confirm the RF link integrity from the Master to each and
every Remote. Please refer to the Poll Test section of the PULSE Link
manual for more information.
ENCOM is not responsible for client equipment configuration or data
cabling issues, unless we provide the complete solution.
There are two distinct scenarios that are addressed in this manual. The first section provides tips and
hints that are useful when deploying a new system. The second provides hints and tips in the event that
you need to resolve performance degradation or failure issues in an existing deployment.
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New Deployments
1
2
3
4
Bench test your radios
This will save you countless hours of
troubleshooting in the field
Bench test your application
Install and troubleshoot your radios
Use the same configurations that were
proven on the bench. Also, prove your
radios before connecting equipment.
Connect client equipment
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Bench Test Your Radios
When working on the bench, your first task is to confirm that the radios communicate reliably with one
another. The steps below will help you create your first link.
Note: Do not connect data cables from the radios to your client equipment at this time.
1.1
1.2
1.3
1.4
1.5
Set these up on the bench
Use ‘Rubber Duck’ antennas, or dummy
loads
Gather a Master radio
Gather a Remote radio
Ensure the Master has power
Ensure the Remote has power
Complete a physical check
Configure the Master radio
Configure the Remote radio
Use ENCOM PULSE Link for configuration
Export your configurations once done
Confirm you have an RF link
Separate the radios by at least 6 feet
Check the RSSI LEDs on the Remote
Confirm the RF link integrity
Use the Poll Test feature in ENCOM PULSE
Link, at the Master
If you are having difficulty establishing a reliable RF link, ENCOM recommends that you:

Double check the configuration of the radios

Increase antenna separation

Check for sources of interference (other radios in the vicinity)
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Once the first link is working perfectly, add radios to your network one at a time. The steps below need
to be performed for each additional radio.
1.6
1.7
1.8
1.9
1.10
Gather the Remote radio
Set this up near the other radios
Use a ‘Rubber Duck’ antenna
Complete a physical check
Ensure the Remote has power
Configure the Remote radio
Use ENCOM PULSE Link for configuration
Import your saved Remote configuration
Ensure you have a unique Unit Address
Confirm you have an RF link
Ensure the Master is at least 6 feet away
Check the RSSI LEDs on the Remote
Confirm the RF link integrity
Use the Poll Test feature in ENCOM PULSE
Link, at the Master, to check all radios
Once the RF link integrity has been confirmed, all of your ENCOM PULSE modems are working
correctly. You can now focus on end-to-end serial communications.
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Bench Test Your Application
The intent of bench testing your application is to confirm end-to-end, Master Controller to Remote
Controller communications. When complete, you will have proven your radio configuration, your data
cables, and your system timing. This is much easier to do on the bench than in the field.
Initially, you only want to connect enough client equipment to communicate over one wireless link. This
is described in the steps below.
2.1
2.2
2.3
2.4
Confirm your wired application
Ensure you have end-to-end
communications over physical wires
Connect the On Street Master
to the Master radio
Use the data cable destined for the field
Connect a Local Controller
to a Remote radio
Use the data cable destined for the field
Confirm your wireless application
Your application should be able to
communicate with your client equipment
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If you are having difficulty communicating reliably with your client equipment, the issue is most likely
related to the serial interfaces. Also note that since the RF link integrity has already been confirmed, the
issue is probably outside of ENCOM’s control. Common issues are listed in the table below.
Possible Problem
Recommendations
Serial data cables
Check for proper signal direction with the
help of a ‘break-out’ box
The Tx and Rx LEDs on the modem are
invaluable, and can help diagnose your issue
PULSE modem configuration
Confirm that the serial settings in the Master
and Remote are consistent with the serial
settings in the client equipment
You may need to adjust the serial settings
and timing parameters in the PULSE modems
depending on your application
Once the application is working over the first wireless link, you can add client equipment incrementally.
For each additional Controller you would like to test:
2.5
2.6
Connect a Local Controller
to a Remote radio
Use the data cable destined for the field
Confirm your wireless application
Your application should be able to
communicate with your client equipment
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Install and Troubleshoot Your Radios
You need to confirm that your radios communicate reliably in the field before connecting your client
equipment. This is same strategy that was applied on the bench.
All PULSE modems and antennas need to be installed first. Note that it is presumed all sites were
qualified with site surveys. The following steps need to be performed at each site.
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
Observe all recommendations in the
ENCOM installation manual
Run the antenna cable
Install and align the antenna
Observe all recommendations in the
ENCOM installation manual
Connect the antenna to the cable
and weatherproof
Install the lightning suppressor
inside the cabinet
Connect the lightning suppressor
to the antenna cable
Do NOT apply power
Do NOT connect a data cable at this time
Install the PULSE modem
inside the cabinet
Connect the PULSE modem to the
lightning suppressor with an RF jumper
Apply power to the PULSE modem
Use PULSE Link to check the configuration
It should match the bench configuration
Confirm your modem configuration
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At this point, all PULSE modems and antennas are in the field. They should all have power, and should
all have valid configurations. The next task is to troubleshoot your wireless network.
3.10
3.11
Visit the Master site
Use the Poll Test feature in PULSE Link to
confirm you can reach all Remotes
Confirm the RF link integrity
Everything should work reliably, without issue, if you configured and tested your network on the bench.
However, if you are having difficulty establishing reliable RF communications, ENCOM recommends that
you:

Confirm the PULSE modems are powered, and antenna cables are connected

Double check the modem configurations

Check the antenna alignment

Consider changing antennas or antenna cables, at problematic sites
Once the RF link integrity has been confirmed, all of your ENCOM PULSE modems are successfully
deployed and are working correctly.
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Connect Client Equipment
Once your ENCOM PULSE modems are successfully configured and deployed, your client equipment can
be attached to the modems. This final stage of the deployment should be the simplest, given that:

You have already confirmed your wireless application on the bench

All ENCOM PULSE modems are successfully deployed and proven
Initially, you only want to connect enough client equipment to communicate over one wireless link. This
is described in the steps below.
4.1
4.2
4.3
Connect the On Street Master
to the Master radio
Connect a Local Controller
to a Remote radio
Your application should be able to
communicate with your client equipment
Confirm your wireless application
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If you are having difficulty communicating reliably with your client equipment, the issue is most likely
related to the client equipment or the serial interfaces. Also note that since the RF link integrity has
already been confirmed, the issue is probably outside of ENCOM’s responsibility. Common issues are
listed in the table below.
Possible Problem
Recommendations
Client equipment
Ensure the telemetry ports are enabled
Ensure Controllers are correctly configured
Serial data cables
Ensure you are using the same cables that
were tested on the bench
You can try swapping cables from known
working locations
PULSE modem configuration
Confirm you have the same serial settings
that were used on the bench
Once the application is working over the first wireless link, you can add remaining client equipment
incrementally.
4.4
4.5
Connect a Local Controller
to a Remote radio
Your application should be able to
communicate with your client equipment
Confirm your wireless application
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Existing Deployments
If a deployed network no longer performs as it once did, start by assessing if there is anything in your
system that has recently changed:

Application software upgrades

Client equipment upgrades

IT changes (new equipment, policy changes, etc.)
Check for environmental changes:

Construction

Foliage
Determine if you are able to reach no Controllers, all Controllers except one, or some Controllers.

If all Controllers are unreachable, the problem is likely at or near the Master

If one Controller is unreachable, the problem is likely at or near that Controller

If some Controllers are unreachable, check a network map to see if unreachable Controllers are
all downstream from a Repeater
Visit each site that you suspect may have an issue.

Perform a physical check (confirm power, cables, antenna)
Always debug the RF links before debugging the serial connections.

Connect a PC to the Master radio and use the Poll Test feature in PULSE Link to confirm if all
PULSE radios are communicating

If you do not have a reliable RF link, try swapping one or more radios for known good ones
If the RF links are operating reliably, check the serial connections

Check the Controller configuration, and cabling

If a Controller cannot be reached, try swapping the radio at that location for a known good one

Try swapping the Controller as a last resort
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Appendix A: RF Exposure
FCC
This equipment has been designed to comply with FCC RF exposure requirements outlined in Parts
2.1091, 2.1093, and 15.247(b)(4). Deviation from the recommended installation may violate RF exposure
requirements.
To comply with FCC RF exposure requirements for mobile transmitting devices, only use or install this
transmitter at locations where there is at least 23cm (9”) separation distance between the antenna
and all persons.
Health Canada
The installer of this radio equipment must ensure that the antenna is located or pointed such that it
does not emit RF field in excess of Health Canada limits for the general population; consult Safety Code
6, obtainable from Health Canada’s website www.hc-sc.gc.ca.
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Appendix B: Declaration of Conformity
FCC
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference
(2) This device must accept any interference received including interference that may cause undesired
operation.
Warning (Part 15.21)
Changes or modifications not expressly approved by the party responsible for compliance could void the
user’s authority to operate the equipment.
Industry Canada
This device complies with Industry Canada RSS-210 specifications
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ENCOM Wireless, based in Calgary, Canada, provides field-proven, cost-effective wireless data solutions
for municipal and industrial clients, with applications in the areas of:
* Intelligent Transportation Systems
* Public safety communications
* Municipal corporate security and IT networks
* Water and waste water management
* Electrical utilities
* Oil and gas
#7, 640 - 42 Avenue NE
Calgary, AB. T2E 7J9
403.230.1122
www.encomwireless.com
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